1 (* Copyright (C) 2002, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
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9 * as published by the Free Software Foundation; either version 2
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
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19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
26 let reduction_tac ~reduction ~status:(proof,goal) =
27 let curi,metasenv,pbo,pty = proof in
28 let metano,context,ty = List.find (function (m,_,_) -> m=goal) metasenv in
29 let new_ty = reduction context ty in
33 (n,_,_) when n = metano -> (metano,context,new_ty)
37 (curi,new_metasenv,pbo,pty), [metano]
40 let simpl_tac = reduction_tac ~reduction:ProofEngineReduction.simpl ;;
41 let reduce_tac = reduction_tac ~reduction:ProofEngineReduction.reduce ;;
42 let whd_tac = reduction_tac ~reduction:CicReduction.whd ;;
44 let fold_tac ~term ~status:(proof,goal) =
45 let curi,metasenv,pbo,pty = proof in
46 let metano,context,ty = List.find (function (m,_,_) -> m=goal) metasenv in
47 let term' = CicReduction.whd context term in
48 (* We don't know if [term] is a subterm of [ty] or a subterm of *)
49 (* the type of one metavariable. So we replace it everywhere. *)
50 (*CSC: ma si potrebbe ovviare al problema. Ma non credo *)
51 (*CSC: che si guadagni nulla in fatto di efficienza. *)
53 ProofEngineReduction.replace ~equality:(=) ~what:term' ~with_what:term
55 let ty' = replace ty in
59 Some (n,Cic.Decl t) -> Some (n,Cic.Decl (replace t))
60 | Some (n,Cic.Def t) -> Some (n,Cic.Def (replace t))
67 (n,_,_) when n = metano -> (metano,context',ty')
71 (curi,metasenv',pbo,pty), [metano]